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Features

Theory Explains How Star Clusters Form and Evolve

All stars are born in groups but then slowly disperse into space. A new theory seeks to explain how these groups form and fall apart or, in rare cases, persist for hundreds of millions of years...

By Steven W. Stahler

The U.S. Is Building Massive DNA Databases

Cops can collect DNA when making an arrest, sometimes before charging a person with a crime. This practice poses a threat to the civil liberties of innocent people

By Erin Murphy

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